中文摘要：

一自我开发逐渐变细桶 rheomoulding (TBR ) 机器被介绍，并且 rheo-diecasting 过程被把 TBR 机器与高压力相结合实现死扔(HPDC ) 机器。rheo-diecasting 部件的微结构特征以不同旋转速度被调查。流动特征和半固体泥浆的微结构进化在 rheo-diecasting 过程期间被分析， rheo-diecasting 部件的机械性质被学习。试验性的结果证明这个过程能获得主要 -Mg 粒子在矩阵好、将近球形、一致地分布式的如此的在部件。什么时候旋转速度内部逐渐变细桶是 700 r/min，主要 -Mg 粒子得到大约 45 m 和大约 0.81 的一个形状因素的一条吝啬的直径。镁合金融化当流动在 TBR 时，有复杂激动人心改正的流动特征机器。与常规死盒子过程相比， rheo-diecasting 过程能改进部件的机械性质；特别，延伸被 80% 改进。

英文摘要：

A self-developed taper barrel rheomoulding（TBR）machine was introduced,and the rheo-diecasting process was implemented by combining TBR machine with the high pressure die casting（HPDC）machine.Microstructural characteristics of the rheo-diecasting components were investigated at different rotation speeds.Flow characteristics and microstructural evolution of the semi-solid slurry during the rheo-diecasting process were analyzed and the mechanical properties of the rheo-diecasting components were studied.The experimental results show that the process is able to obtain such components in which the primaryα-Mg particles are fine,nearly spherical and uniformly distributed in the matrix.When the rotation speed of internal taper barrel is 700 r/min,the primaryα-Mg particles get a mean diameter of about 45μm and a shape factor of about 0.81.The magnesium alloy melt has complex stirring-fixed flow characteristics when flowing in TBR machine.Compared with conventional die-casing process,the rheo-diecasting process can improve the mechanical properties of components; especially,the elongation is improved by 80%.